Multi F Outdoor Condenser Installation Manual
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MULTI F / MULTI F MAX Outdoor Unit Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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1. Detach the outdoor unit panels by loosening the screws.
2. Remove the control cover (if applicable) by loosening the screws.
3. Remove the conduit knock outs or access holes.
4. Pull the power wiring, and the communications / connection (power) cable into the
outdoor unit (through the conduits, if applicable). Ensure there is enough length to
connect to the terminals on the outdoor unit. Secure any conduits with field-sup-
plied lock nuts.
5. Connect the power wiring, and the communications / connection (power) cable to
the correct terminals on the outdoor unit.
6. Connect communications / connection (power) cable to the correct control board
terminals on the indoor unit (or branch distribution unit[s] if Multi F MAX system).
7. Follow the wiring diagrams on the outdoor unit and indoor units (or branch distri-
bution unit[s]) control covers. Ensure that the terminal board numbers and wiring
color on the outdoor unit matches the terminal number and wiring color on the
indoor unit or branch distribution unit(s).
8. Provide strain relief and help protect the connections by (separately) securing the
wiring / cable to the outdoor unit with the factory-supplied clamps (up to 35 lbs.).
Clamps are included near the terminal block. Zip ties can also be used to hold all
cables in place.
9. For more installation information for specific indoor units, refer to the separate
indoor unit installation manuals on www.lghvac.com.
10. When all connections are complete, reattach the control cover to its original posi-
tion using the screws, then reinstall the outdoor unit panel.
11. After installation is complete, seal any gaps around the wiring in the panel access
holes or the conduits.
Figure 87: Connecting the Power Wiring / Communi-
cations Cables to the Outdoor Unit (LMU18~36CHV;
LMU480, 540HV).
Figure 88: Connecting the Power Wiring / Communi-
cations Cables to the Outdoor Unit (LMU600HV).
• Always have a trained technician properly ground the outdoor unit. If the outdoor unit
is not properly grounded, there is a risk of electric shock, physical injury, or death.
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• Failure to properly provide a NEC-approved earth ground can result in electric shock,
fire, physical injury or death.
• Comply with local and national codes while running the wire from the indoor unit
(and branch distribution units if Multi F MAX system) to the outdoor unit (size of wire
and wiring method, etc). Incorrectly sized wiring will cause the terminal to overheat,
generate a fire, and risk physical injury or death.
• All wiring / cable must be firmly connected to its terminal. Loose wiring will cause the
terminal to overheat, generate a fire, and risk physical injury or death.
•
Do not allow the wiring / cable to touch refrigerant tubing, the compressor, or
any moving parts. It can result in electric shock, fire, physical injury or death.
• Replace all control box and panel covers. If cover panels are not installed securely,
dust, water and animals will enter the outdoor unit, causing fire, electric shock, and
physical injury or death.
• Ensure the communications / connection (power) cable from the outdoor units to the indoor / branch distribution units, and the power wiring
to the outdoor unit are separate; otherwise, the outdoor unit operation will be affected by electrical noise and will malfunction or fail.
• The communications / connection (power) cable from the outdoor unit to the indoor / branch distribution units must be separated and
isolated from power wiring to the outdoor unit, computers, elevators, radio and television broadcasting facilities, as well as medical imaging
equipment; otherwise, the outdoor unit operation will be affected by electrical noise and will malfunction or fail.
• All wiring / cable must be firmly connected to its terminals. Loose wiring will result in unit malfunction.
ELECTRICAL
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Power supply cabl
(1Ø, 208/230V)
Power Supply Cable
(1Ø, 208/230V)
Connecting cabl
Connecting Cable
Lock nut
(Field Supplied)
Indoor Unit A
Conduit
(Field Supplied)
Indoor Unit B
Indoor Unit C
Indoor Unit D
Conduit
Hole
Power Wiring
Terminal
Communication / Connection
(Power) Cable Terminal
(To the Indoor Units / Branch
Distribution Units)
Cord Clamp
Cord Clamp
* Make sure the rubber bushes are
properly used in knock-out holes after
connecting the wiring and cables.
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